Sliding-door lock.



J. SUHMITTBERGER.

SLIDING DOOR LOOK.

APPLICATION FILED 11.24, 1912.

1,086,34 Patented Aug. 20, 1912.

v d was:

JOSEPH SCHMITTBERGER, or wEEnAw En HEIIGHTS. NE JERSEY.

SLIDING-DOOR IlOCK.

' To azz whom it may concern:

Be'it known that I, JOSEPH SOHlVII'I'IBER- GER, a citizen of the United States, and residing at lVeehawken Heights, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Sliding-Door Locks, of which the following is a specification, such as will enable those skilled in the art to which it appertainsto make and use the same.

This invention relates to door locks, and particularly to locks designed for use in connection with sliding doors, and the object. thereof is to provide an improved lock of this class which is simple in construction and operation and which operates automatically to lock the door in the operation ofclosing the door; and with this and other objects in View the invention consists in a lock of the class specified, constructed as hereinafter described and claimed. The invention is fully disclosed in the following specification of which the accom panying drawing forms a part, in which the separate parts of my invention are desig-j -nated by suitable reference characters in each of the views, and in which Figure 1 is a sectional view of a part of s a door frame and a part of a door and show{ ing my improved lock and the method of its automatic action in the operation of closing. the door, and, Fig. 2 a diagrammatic view showing the parts of the lock in a different position. V

In the drawing forming part of this speci-f ficationI have shown at 1 apart of a door; frame and-at 2 a part ofa sliding door, and

secured to the face of the .door frame is a strike plate 3 having a vertical slot or opening 4 inwardly of which is a chamber 5 formed in said frame.

In the practice of my invention I provide a suitable lock casino 6 having a face plate 7 provided with a vertical slot or opening 8, and-inwardly of which. is mounted a rotatable spur wheel 9 provided with a plurality of teeth 10 four of which are shown and which are preferably hook-shaped in form and operate through the slots 4 and 8. f

Pivoted atll rearwardly of and-below the spur wheel 9 is anti-shaped lock lever '12 one arm 13 of which operates in'con'nection with the spur wheel 9, and the other arm 14 of which extends upwa'rdl'y' and backwardly Specification of Letters Patent! 4 Patented Aug. 20, 1912.

Application filed April 24, 1912. 4 Serial No. 692,786. t

arm 14 of the lever 12, and the front end portion of the dog 18 is provided, in'the bottom edge thereof, with a longitudinal recess 19 the wall. of which is curved, as shown at 20 and at the rear end of Which is a shoulde'r21. A In practice the casing 6, which may beof' any desired form or construction, and which only-serves as a support for the movable parts of the lock is countersunk in the door, in the-usual manner, and said casing is provided with a key hole 22 which also passes through the door and through which a key 23 may be passed, and. in the operation of the look, as hereinafter described, the movement of the dog 18 is limited by stops 24 and 25 placed thereover and thereunder, as shown.

1 With this construction, when the door. is closed one of the teeth 10 of the wheel 9 strikes the top wall of the slot-4 in the'plate 3 and said wheel is rotated in the direction of the arrow 27, and the next successive tooth engages the plate 3, as shown at 26,

and at the same time the lever 12 is thrown into the position shownin said figure by the spring 15', and the arm 13 abuts against the back of the next tooth of said wheel and said wheel is locked against rotation, and the door is also looked, as will be readily understood. In order to unlock the door the key 23 is inserted and maybe turned in the direction of either of the arrows 28 or 29. In this operation the key strikes the free end of. the dog 18 which is forced up-f1 Wardly against the arm 14 of the'lever" 12, and the.arm 13 of said lever is forced downwardly against the operation of the 1 spring 15, and this will permitthe wheel19f100 to turn backwardly and the door'may be opened, as .will 'be readily .understood, and the lever 12'may be locked in the open posi tion,as shownin Fig. 2, by turningthe key I 23'into the position shown in said figure and leaving it there, and with the leverQ12and dog 18 in the-position shown in Fig'yr'2, the doormay be freely opened and closed, and

a when it is desired to closethe door and lock it the key is again turned into the position shown in Fig. 1.

My improved lock may be used wherever devices of this class are required, in connection with sliding doors,,gates, or other articles of this class, and changes in and modifications of the parts of the look as herein shown and described, may be made,'within the scope of the appended 'claims, without departingfrom the spirit of my invention or sacrificing its advantages.

Having fully described my invention what I claim as new and desire to secure by Let with the teeth thereof, a spring connected with the other arm of said lever and adapted to hold it 1n operative position, and a dog pivoted rearwardly of said lever and adapted to operate in connection therewith, said dog being adapted to be operated by a key.

2. In a look, a strike plate provided with a vertical slot and a lock casing having a face plate provided with a corresponding slot, a spur wheel mounted in said casing rearwardly of the face thereof and the teeth of which operate through both of said slots, said spur wheel being mounted in a vertical plane and being adapted to be rotated when the teeth thereof come in contact with the strike plate, devices whereby said spur wheel is tensionally held against rotation in the opposite direction, and means whereby said devices maybe thrown out of operation by the insertion and rotation of a key.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 23rd day of April 1912.

JOSEPH SGHMITTBERGER. Witnesses:

C. MULREANY, S. ANDREWS. 

